No, I've just listened to postmoderns and counter-postmoderns argue about it.
I wouldn't necessarily associate SJW and postmodern, though they are related, so I wouldn't be surprised to see ideas you wouldn't expect from SJWs. The point that counter-postmoderns make is not about the topics written about so much as the methos used and lack of reasoning behind them. We have seen our fair share of that style here on the forum, the sort of re-interpretive narrative that sees everything from a different view, a narrative that fits together, narrative that's interesting though divorced from reality and reason, trying to knock down old heirarchies only to replace them with new power structures. The arguments that, say, gender is just a social construct come to mind.